/* ezxml.c
 *
 * Copyright 2004-2006 Aaron Voisine <aaron@voisine.org>
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice shall be included
 * in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
 * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

/* Ted Campbell, Aug 14 2007 */
#if defined(WIN32) || defined(_WIN32)
#include <io.h>

#ifndef EZXML_NOMMAP
#define EZXML_NOMMAP
#endif /* EXXML_NOMMAP */
#endif /* WIN32 */

#include <stdlib.h>
#include <stdio.h>
#include <stdarg.h>
#include <string.h>
#include <ctype.h>

/* Ted Campbell, Aug 14 2007 */
#if !defined(WIN32) && !defined(_WIN32)
#include <unistd.h>
#endif

#include <sys/types.h>
#ifndef EZXML_NOMMAP
#include <sys/mman.h>
#endif /* EZXML_NOMMAP */
#include <sys/stat.h>
#include "ezxml.h"

/* Ted Campbell, Aug 14, 2007 */
#include "util.h"

/* Ted Campbell, Aug 14, 2007 */
#if defined(WIN32) || defined(_WIN32)
#define snprintf _snprintf
#define open _open
#define read _read
#define write _write
#define close _close
#endif /* WIN32 */

#define EZXML_WS   "\t\r\n "	/* whitespace */
#define EZXML_ERRL 128		/* maximum error string length */

typedef struct ezxml_root *ezxml_root_t;
struct ezxml_root
{				/* additional data for the root tag */
    struct ezxml xml;		/* is a super-struct built on top of ezxml struct */
    ezxml_t cur;		/* current xml tree insertion point */
    char *m;			/* original xml string */
    size_t len;			/* length of allocated memory for mmap, -1 for malloc */
    char *u;			/* UTF-8 conversion of string if original was UTF-16 */
    char *s;			/* start of work area */
    char *e;			/* end of work area */
    char **ent;			/* general entities (ampersand sequences) */
    char ***attr;		/* default attributes */
    char ***pi;			/* processing instructions */
    short standalone;		/* non-zero if <?xml standalone="yes"?> */
    char err[EZXML_ERRL];	/* error string */
};

char *EZXML_NIL[] = { NULL };	/* empty, null terminated array of strings */

/* returns the first child tag with the given name or NULL if not found */
ezxml_t
ezxml_child(ezxml_t xml,
	    const char *name)
{
    xml = (xml) ? xml->child : NULL;
    while(xml && strcmp(name, xml->name))
	xml = xml->sibling;
    return xml;
}

/* returns the Nth tag with the same name in the same subsection or NULL if not */
/* found */
ezxml_t
ezxml_idx(ezxml_t xml,
	  int idx)
{
    for(; xml && idx; idx--)
	xml = xml->next;
    return xml;
}

/* returns the value of the requested tag attribute or NULL if not found */
const char *
ezxml_attr(ezxml_t xml,
	   const char *attr)
{
    int i = 0, j = 1;
    ezxml_root_t root = (ezxml_root_t) xml;

    if(!xml || !xml->attr)
	return NULL;
    while(xml->attr[i] && strcmp(attr, xml->attr[i]))
	i += 2;
    if(xml->attr[i])
	return xml->attr[i + 1];	/* found attribute */

    while(root->xml.parent)
	root = (ezxml_root_t) root->xml.parent;	/* root tag */
    for(i = 0; root->attr[i] && strcmp(xml->name, root->attr[i][0]); i++);
    if(!root->attr[i])
	return NULL;		/* no matching default attributes */
    while(root->attr[i][j] && strcmp(attr, root->attr[i][j]))
	j += 3;
    return (root->attr[i][j]) ? root->attr[i][j + 1] : NULL;	/* found default */
}

/* same as ezxml_get but takes an already initialized va_list */
ezxml_t
ezxml_vget(ezxml_t xml,
	   va_list ap)
{
    char *name = va_arg(ap, char *);
    int idx = -1;

    if(name && *name)
	{
	    idx = va_arg(ap, int);

	    xml = ezxml_child(xml, name);
	}
    return (idx < 0) ? xml : ezxml_vget(ezxml_idx(xml, idx), ap);
}

/* Traverses the xml tree to retrieve a specific subtag. Takes a variable */
/* length list of tag names and indexes. The argument list must be terminated */
/* by either an index of -1 or an empty string tag name. Example:  */
/* title = ezxml_get(library, "shelf", 0, "book", 2, "title", -1); */
/* This retrieves the title of the 3rd book on the 1st shelf of library. */
/* Returns NULL if not found. */
ezxml_t
ezxml_get(ezxml_t xml,
	  ...)
{
    va_list ap;
    ezxml_t r;

    va_start(ap, xml);
    r = ezxml_vget(xml, ap);
    va_end(ap);
    return r;
}

/* returns a null terminated array of processing instructions for the given */
/* target */
const char **
ezxml_pi(ezxml_t xml,
	 const char *target)
{
    ezxml_root_t root = (ezxml_root_t) xml;
    int i = 0;

    if(!root)
	return (const char **)EZXML_NIL;
    while(root->xml.parent)
	root = (ezxml_root_t) root->xml.parent;	/* root tag */
    while(root->pi[i] && strcmp(target, root->pi[i][0]))
	i++;			/* find target */
    return (const char **)((root->pi[i]) ? root->pi[i] + 1 : EZXML_NIL);
}

/* set an error string and return root */
ezxml_t
ezxml_err(ezxml_root_t root,
	  char *s,
	  const char *err,
	  ...)
{
    va_list ap;
    int line = 1;
    char *t, fmt[EZXML_ERRL];

    for(t = root->s; t < s; t++)
	if(*t == '\n')
	    line++;
    snprintf(fmt, EZXML_ERRL, "[error near line %d]: %s", line, err);

    va_start(ap, err);
    vsnprintf(root->err, EZXML_ERRL, fmt, ap);
    va_end(ap);

    return &root->xml;
}

/* Recursively decodes entity and character references and normalizes new lines */
/* ent is a null terminated array of alternating entity names and values. set t */
/* to '&' for general entity decoding, '%' for parameter entity decoding, 'c' */
/* for cdata sections, ' ' for attribute normalization, or '*' for non-cdata */
/* attribute normalization. Returns s, or if the decoded string is longer than */
/* s, returns a malloced string that must be freed. */
char *
ezxml_decode(char *s,
	     char **ent,
	     char t)
{
    char *e, *r = s, *m = s;
    long b, c, d, l;

    for(; *s; s++)
	{			/* normalize line endings */
	    while(*s == '\r')
		{
		    *(s++) = '\n';
		    if(*s == '\n')
			memmove(s, (s + 1), strlen(s));
		}
	}

    for(s = r;;)
	{
	    while(*s && *s != '&' && (*s != '%' || t != '%') && !isspace(*s))
		s++;

	    if(!*s)
		break;
	    else if(t != 'c' && !strncmp(s, "&#", 2))
		{		/* character reference */
		    if(s[2] == 'x')
			c = strtol(s + 3, &e, 16);	/* base 16 */
		    else
			c = strtol(s + 2, &e, 10);	/* base 10 */
		    if(!c || *e != ';')
			{
			    s++;
			    continue;
			}
		    /* not a character ref */
		    if(c < 0x80)
			*(s++) = c;	/* US-ASCII subset */
		    else
			{	/* multi-byte UTF-8 sequence */
			    for(b = 0, d = c; d; d /= 2)
				b++;	/* number of bits in c */
			    b = (b - 2) / 5;	/* number of bytes in payload */
			    *(s++) = (0xFF << (7 - b)) | (c >> (6 * b));	/* head */
			    while(b)
				*(s++) = 0x80 | ((c >> (6 * --b)) & 0x3F);	/* payload */
			}

		    memmove(s, strchr(s, ';') + 1, strlen(strchr(s, ';')));
		}
	    else if((*s == '&' && (t == '&' || t == ' ' || t == '*'))
		    || (*s == '%' && t == '%'))
		{		/* entity reference */
		    for(b = 0; ent[b] && strncmp(s + 1, ent[b], strlen(ent[b])); b += 2);	/* find entity in entity list */

		    if(ent[b++])
			{	/* found a match */
			    if((c = strlen(ent[b])) - 1 > (e =
							   strchr(s,
								  ';')) - s)
				{
				    l = (d = (s - r)) + c + strlen(e);	/* new length */
				    r = (r == m) ? strcpy(malloc(l),
							  r) : realloc(r, l);
				    e = strchr((s = r + d), ';');	/* fix up pointers */
				}

			    memmove(s + c, e + 1, strlen(e));	/* shift rest of string */
			    strncpy(s, ent[b], c);	/* copy in replacement text */
			}
		    else
			s++;	/* not a known entity */
		}
	    else if((t == ' ' || t == '*') && isspace(*s))
		*(s++) = ' ';
	    else
		s++;		/* no decoding needed */
	}

    if(t == '*')
	{			/* normalize spaces for non-cdata attributes */
	    for(s = r; *s; s++)
		{
		    /* Jason Luu, Aug 29, 2007. Removed assignment in conditional statement */
		    l = strspn(s, " ");
		    if(l)
			memmove(s, s + l, strlen(s + l) + 1);
		    while(*s && *s != ' ')
			s++;
		}
	    if(--s >= r && *s == ' ')
		*s = '\0';	/* trim any trailing space */
	}
    return r;
}

/* called when parser finds start of new tag */
void
ezxml_open_tag(ezxml_root_t root,
	       char *name,
	       char **attr)
{
    ezxml_t xml = root->cur;

    if(xml->name)
	xml = ezxml_add_child(xml, name, strlen(xml->txt));
    else
	xml->name = name;	/* first open tag */

    xml->attr = attr;
    root->cur = xml;		/* update tag insertion point */
}

/* called when parser finds character content between open and closing tag */
void
ezxml_char_content(ezxml_root_t root,
		   char *s,
		   size_t len,
		   char t)
{
    ezxml_t xml = root->cur;
    char *m = s;
    size_t l;

    if(!xml || !xml->name || !len)
	return;			/* sanity check */

    s[len] = '\0';		/* null terminate text (calling functions anticipate this) */
    len = strlen(s = ezxml_decode(s, root->ent, t)) + 1;

    if(!*(xml->txt))
	xml->txt = s;		/* initial character content */
    else
	{			/* allocate our own memory and make a copy */
	    xml->txt = (xml->flags & EZXML_TXTM)	/* allocate some space */
		? realloc(xml->txt, (l = strlen(xml->txt)) + len)
		: strcpy(malloc((l = strlen(xml->txt)) + len), xml->txt);
	    strcpy(xml->txt + l, s);	/* add new char content */
	    if(s != m)
		free(s);	/* free s if it was malloced by ezxml_decode() */
	}

    if(xml->txt != m)
	ezxml_set_flag(xml, EZXML_TXTM);
}

/* called when parser finds closing tag */
ezxml_t
ezxml_close_tag(ezxml_root_t root,
		char *name,
		char *s)
{
    if(!root->cur || !root->cur->name || strcmp(name, root->cur->name))
	return ezxml_err(root, s, "unexpected closing tag </%s>", name);

    root->cur = root->cur->parent;
    return NULL;
}

/* checks for circular entity references, returns non-zero if no circular */
/* references are found, zero otherwise */
int
ezxml_ent_ok(char *name,
	     char *s,
	     char **ent)
{
    int i;

    for(;; s++)
	{
	    while(*s && *s != '&')
		s++;		/* find next entity reference */
	    if(!*s)
		return 1;
	    if(!strncmp(s + 1, name, strlen(name)))
		return 0;	/* circular ref. */
	    for(i = 0; ent[i] && strncmp(ent[i], s + 1, strlen(ent[i]));
		i += 2);
	    if(ent[i] && !ezxml_ent_ok(name, ent[i + 1], ent))
		return 0;
	}
}

/* called when the parser finds a processing instruction */
void
ezxml_proc_inst(ezxml_root_t root,
		char *s,
		size_t len)
{
    int i = 0, j = 1;
    char *target = s;

    s[len] = '\0';		/* null terminate instruction */
    if(*(s += strcspn(s, EZXML_WS)))
	{
	    *s = '\0';		/* null terminate target */
	    s += strspn(s + 1, EZXML_WS) + 1;	/* skip whitespace after target */
	}

    if(!strcmp(target, "xml"))
	{			/* <?xml ... ?> */
	    /* Jason Luu, Aug 29, 2007. Removed assignment in conditional statement */
	    s = strstr(s, "standalone");
	    if(s && !strncmp(s + strspn(s + 10,
					EZXML_WS "='\"") + 10, "yes", 3))
		root->standalone = 1;
	    return;
	}

    if(!root->pi[0])
	*(root->pi = malloc(sizeof(char **))) = NULL;	/*first pi */

    while(root->pi[i] && strcmp(target, root->pi[i][0]))
	i++;			/* find target */
    if(!root->pi[i])
	{			/* new target */
	    root->pi = realloc(root->pi, sizeof(char **) * (i + 2));
	    root->pi[i] = malloc(sizeof(char *) * 3);
	    root->pi[i][0] = target;
	    root->pi[i][1] = (char *)(root->pi[i + 1] = NULL);	/* terminate pi list */
	    /* Ted Campbell, Aug 14, 2007. Changed to use 'my_strdup' */
	    root->pi[i][2] = my_strdup("");	/* empty document position list */
	}

    while(root->pi[i][j])
	j++;			/* find end of instruction list for this target */
    root->pi[i] = realloc(root->pi[i], sizeof(char *) * (j + 3));
    root->pi[i][j + 2] = realloc(root->pi[i][j + 1], j + 1);
    strcpy(root->pi[i][j + 2] + j - 1, (root->xml.name) ? ">" : "<");
    root->pi[i][j + 1] = NULL;	/* null terminate pi list for this target */
    root->pi[i][j] = s;		/* set instruction */
}

/* called when the parser finds an internal doctype subset */
short
ezxml_internal_dtd(ezxml_root_t root,
		   char *s,
		   size_t len)
{
    char q, *c, *t, *n = NULL, *v, **ent, **pe;
    int i, j;

    pe = memcpy(malloc(sizeof(EZXML_NIL)), EZXML_NIL, sizeof(EZXML_NIL));

    for(s[len] = '\0'; s;)
	{
	    while(*s && *s != '<' && *s != '%')
		s++;		/* find next declaration */

	    if(!*s)
		break;
	    else if(!strncmp(s, "<!ENTITY", 8))
		{		/* parse entity definitions */
		    c = s += strspn(s + 8, EZXML_WS) + 8;	/* skip white space separator */
		    n = s + strspn(s, EZXML_WS "%");	/* find name */
		    *(s = n + strcspn(n, EZXML_WS)) = ';';	/* append ; to name */

		    v = s + strspn(s + 1, EZXML_WS) + 1;	/* find value */
		    if((q = *(v++)) != '"' && q != '\'')
			{	/* skip externals */
			    s = strchr(s, '>');
			    continue;
			}

		    for(i = 0, ent = (*c == '%') ? pe : root->ent; ent[i];
			i++);
		    ent = realloc(ent, (i + 3) * sizeof(char *));	/* space for next ent */
		    if(*c == '%')
			pe = ent;
		    else
			root->ent = ent;

		    *(++s) = '\0';	/* null terminate name */
		    /* Jason Luu, Aug 29, 2007. Removed assignment in conditional statement */
		    s = strchr(v, q);
		    if(s)
			*(s++) = '\0';	/* null terminate value */
		    ent[i + 1] = ezxml_decode(v, pe, '%');	/* set value */
		    ent[i + 2] = NULL;	/* null terminate entity list */
		    if(!ezxml_ent_ok(n, ent[i + 1], ent))
			{	/* circular reference */
			    if(ent[i + 1] != v)
				free(ent[i + 1]);
			    ezxml_err(root, v,
				      "circular entity declaration &%s", n);
			    break;
			}
		    else
			ent[i] = n;	/* set entity name */
		}
	    else if(!strncmp(s, "<!ATTLIST", 9))
		{		/* parse default attributes */
		    t = s + strspn(s + 9, EZXML_WS) + 9;	/* skip whitespace separator */
		    if(!*t)
			{
			    ezxml_err(root, t, "unclosed <!ATTLIST");
			    break;
			}
		    if(*(s = t + strcspn(t, EZXML_WS ">")) == '>')
			continue;
		    else
			*s = '\0';	/* null terminate tag name */
		    for(i = 0; root->attr[i] && strcmp(n, root->attr[i][0]);
			i++);

		    while(*(n = ++s + strspn(s, EZXML_WS)) && *n != '>')
			{
			    if(*(s = n + strcspn(n, EZXML_WS)))
				*s = '\0';	/* attr name */
			    else
				{
				    ezxml_err(root, t, "malformed <!ATTLIST");
				    break;
				}

			    s += strspn(s + 1, EZXML_WS) + 1;	/* find next token */
			    c = (strncmp(s, "CDATA", 5)) ? "*" : " ";	/* is it cdata? */
			    if(!strncmp(s, "NOTATION", 8))
				s += strspn(s + 8, EZXML_WS) + 8;
			    s = (*s == '(') ? strchr(s, ')') : s + strcspn(s,
									   EZXML_WS);
			    if(!s)
				{
				    ezxml_err(root, t, "malformed <!ATTLIST");
				    break;
				}

			    s += strspn(s, EZXML_WS ")");	/* skip white space separator */
			    if(!strncmp(s, "#FIXED", 6))
				s += strspn(s + 6, EZXML_WS) + 6;
			    if(*s == '#')
				{	/* no default value */
				    s += strcspn(s, EZXML_WS ">") - 1;
				    if(*c == ' ')
					continue;	/* cdata is default, nothing to do */
				    v = NULL;
				}
			    else
				{
				    /* Jason Luu, Aug 29, 2007. Removed assignment in conditional statement */
				    s = strchr(v = s + 1, *s);
				    if((*s == '"' || *s == '\'') &&	/* default value */
				       s)
					*s = '\0';
				    else
					{
					    ezxml_err(root, t,
						      "malformed <!ATTLIST");
					    break;
					}
				}

			    if(!root->attr[i])
				{	/* new tag name */
				    root->attr =
					(!i) ? malloc(2 *
						      sizeof(char **)) :
					realloc(root->attr,
						(i + 2) * sizeof(char **));
				    root->attr[i] =
					malloc(2 * sizeof(char *));
				    root->attr[i][0] = t;	/* set tag name */
				    root->attr[i][1] =
					(char *)(root->attr[i + 1] = NULL);
				}

			    for(j = 1; root->attr[i][j]; j += 3);	/* find end of list */
			    root->attr[i] = realloc(root->attr[i],
						    (j + 4) * sizeof(char *));

			    root->attr[i][j + 3] = NULL;	/* null terminate list */
			    root->attr[i][j + 2] = c;	/* is it cdata? */
			    root->attr[i][j + 1] =
				(v) ? ezxml_decode(v, root->ent, *c) : NULL;
			    root->attr[i][j] = n;	/* attribute name  */
			}
		}
	    else if(!strncmp(s, "<!--", 4))
		s = strstr(s + 4, "-->");	/* comments */
	    else if(!strncmp(s, "<?", 2))
		{		/* processing instructions */
		    /* Jason Luu, Aug 29, 2007. Removed assignment in conditional statement */
		    s = strstr(c = s + 2, "?>");
		    if(s)
			ezxml_proc_inst(root, c, s++ - c);
		}
	    else if(*s == '<')
		s = strchr(s, '>');	/* skip other declarations */
	    else if(*(s++) == '%' && !root->standalone)
		break;
	}

    free(pe);
    return !*root->err;
}

/* Converts a UTF-16 string to UTF-8. Returns a new string that must be freed */
/* or NULL if no conversion was needed. */
char *
ezxml_str2utf8(char **s,
	       size_t * len)
{
    char *u;
    size_t l = 0, sl, max = *len;
    long c, d;
    int b, be = (**s == '\xFE') ? 1 : (**s == '\xFF') ? 0 : -1;

    if(be == -1)
	return NULL;		/* not UTF-16 */

    u = malloc(max);
    for(sl = 2; sl < *len - 1; sl += 2)
	{
	    c = (be) ? (((*s)[sl] & 0xFF) << 8) | ((*s)[sl + 1] & 0xFF)	/*UTF-16BE */
		: (((*s)[sl + 1] & 0xFF) << 8) | ((*s)[sl] & 0xFF);	/*UTF-16LE */
	    if(c >= 0xD800 && c <= 0xDFFF && (sl += 2) < *len - 1)
		{		/* high-half */
		    d = (be) ? (((*s)[sl] & 0xFF) << 8) | ((*s)[sl + 1] &
							   0xFF)
			: (((*s)[sl + 1] & 0xFF) << 8) | ((*s)[sl] & 0xFF);
		    c = (((c & 0x3FF) << 10) | (d & 0x3FF)) + 0x10000;
		}

	    while(l + 6 > max)
		u = realloc(u, max += EZXML_BUFSIZE);
	    if(c < 0x80)
		u[l++] = c;	/* US-ASCII subset */
	    else
		{		/* multi-byte UTF-8 sequence */
		    for(b = 0, d = c; d; d /= 2)
			b++;	/* bits in c */
		    b = (b - 2) / 5;	/* bytes in payload */
		    u[l++] = (0xFF << (7 - b)) | (c >> (6 * b));	/* head */
		    while(b)
			u[l++] = 0x80 | ((c >> (6 * --b)) & 0x3F);	/* payload */
		}
	}
    return *s = realloc(u, *len = l);
}

/* frees a tag attribute list */
void
ezxml_free_attr(char **attr)
{
    int i = 0;
    char *m;

    if(!attr || attr == EZXML_NIL)
	return;			/* nothing to free */
    while(attr[i])
	i += 2;			/* find end of attribute list */
    m = attr[i + 1];		/* list of which names and values are malloced */
    for(i = 0; m[i]; i++)
	{
	    if(m[i] & EZXML_NAMEM)
		free(attr[i * 2]);
	    if(m[i] & EZXML_TXTM)
		free(attr[(i * 2) + 1]);
	}
    free(m);
    free(attr);
}

/* parse the given xml string and return an ezxml structure */
ezxml_t
ezxml_parse_str(char *s,
		size_t len)
{
    ezxml_root_t root = (ezxml_root_t) ezxml_new(NULL);
    char q, e, *d, **attr, **a = NULL;	/* initialize a to avoid compile warning */
    int l, i, j;

    root->m = s;
    if(!len)
	return ezxml_err(root, NULL, "root tag missing");
    root->u = ezxml_str2utf8(&s, &len);	/* convert utf-16 to utf-8 */
    root->e = (root->s = s) + len;	/* record start and end of work area */

    e = s[len - 1];		/* save end char */
    s[len - 1] = '\0';		/* turn end char into null terminator */

    while(*s && *s != '<')
	s++;			/* find first tag */
    if(!*s)
	return ezxml_err(root, s, "root tag missing");

    for(;;)
	{
	    attr = (char **)EZXML_NIL;
	    d = ++s;

	    if(isalpha(*s) || *s == '_' || *s == ':' || *s < '\0')
		{		/* new tag */
		    if(!root->cur)
			return ezxml_err(root, d,
					 "markup outside of root element");

		    s += strcspn(s, EZXML_WS "/>");
		    while(isspace(*s))
			*(s++) = '\0';	/* null terminate tag name */

		    if(*s && *s != '/' && *s != '>')
			{	/* find tag in default attr list */
			    /* Jason Luu, Aug 29, 2007. Removed assignment in conditional statement */
			    a = root->attr[0];
			    for(i = 0; a && strcmp(a[0], d); i++)
				{
				    a = root->attr[i];
				}
			}

		    for(l = 0; *s && *s != '/' && *s != '>'; l += 2)
			{	/* new attrib */
			    attr = (l) ? realloc(attr, (l + 4) * sizeof(char *)) : malloc(4 * sizeof(char *));	/* allocate space */
			    attr[l + 3] = (l) ? realloc(attr[l + 1], (l / 2) + 2) : malloc(2);	/* mem for list of maloced vals */
			    strcpy(attr[l + 3] + (l / 2), " ");	/* value is not malloced */
			    attr[l + 2] = NULL;	/* null terminate list */
			    attr[l + 1] = "";	/* temporary attribute value */
			    attr[l] = s;	/* set attribute name */

			    s += strcspn(s, EZXML_WS "=/>");
			    if(*s == '=' || isspace(*s))
				{
				    *(s++) = '\0';	/* null terminate tag attribute name */
				    q = *(s += strspn(s, EZXML_WS "="));
				    if(q == '"' || q == '\'')
					{	/* attribute value */
					    attr[l + 1] = ++s;
					    while(*s && *s != q)
						s++;
					    if(*s)
						*(s++) = '\0';	/* null terminate attribute val */
					    else
						{
						    ezxml_free_attr(attr);
						    return ezxml_err(root, d,
								     "missing %c",
								     q);
						}

					    for(j = 1; a && a[j]
						&& strcmp(a[j], attr[l]);
						j += 3);
					    attr[l + 1] =
						ezxml_decode(attr[l + 1],
							     root->ent, (a
									 &&
									 a[j])
							     ? *a[j +
								  2] : ' ');
					    if(attr[l + 1] < d
					       || attr[l + 1] > s)
						attr[l + 3][l / 2] = EZXML_TXTM;	/* value malloced */
					}
				}
			    while(isspace(*s))
				s++;
			}

		    if(*s == '/')
			{	/* self closing tag */
			    *(s++) = '\0';
			    if((*s && *s != '>') || (!*s && e != '>'))
				{
				    if(l)
					ezxml_free_attr(attr);
				    return ezxml_err(root, d, "missing >");
				}
			    ezxml_open_tag(root, d, attr);
			    ezxml_close_tag(root, d, s);
			}
		    else if((q = *s) == '>' || (!*s && e == '>'))
			{	/* open tag */
			    *s = '\0';	/* temporarily null terminate tag name */
			    ezxml_open_tag(root, d, attr);
			    *s = q;
			}
		    else
			{
			    if(l)
				ezxml_free_attr(attr);
			    return ezxml_err(root, d, "missing >");
			}
		}
	    else if(*s == '/')
		{		/* close tag */
		    s += strcspn(d = s + 1, EZXML_WS ">") + 1;
		    /* Jason Luu, Aug 29, 2007. Removed assignment in conditional statement */
		    q = *s;
		    if(!q && e != '>')
			return ezxml_err(root, d, "missing >");
		    *s = '\0';	/* temporarily null terminate tag name */
		    if(ezxml_close_tag(root, d, s))
			return &root->xml;
		    if(isspace(*s = q))
			s += strspn(s, EZXML_WS);
		}
	    else if(!strncmp(s, "!--", 3))
		{		/* xml comment */
		    s = strstr(s + 3, "--");
		    if(!s || (*(s += 2) != '>' && *s) || (!*s && e != '>'))
			return ezxml_err(root, d, "unclosed <!--");
		}
	    else if(!strncmp(s, "![CDATA[", 8))
		{		/* cdata */
		    /* Jason Luu, Aug 29, 2007. Removed assignment in conditional statement */
		    s = strstr(s, "]]>");
		    if(s)
			ezxml_char_content(root, d + 8, (s += 2) - d - 10,
					   'c');
		    else
			return ezxml_err(root, d, "unclosed <![CDATA[");
		}
	    else if(!strncmp(s, "!DOCTYPE", 8))
		{		/* dtd */
		    for(l = 0; *s && ((!l && *s != '>') || (l && (*s != ']' ||
								  *(s +
								    strspn(s +
									   1,
									   EZXML_WS)
								    + 1) !=
								  '>')));
			l = (*s == '[') ? 1 : l)
			s += strcspn(s + 1, "[]>") + 1;
		    if(!*s && e != '>')
			return ezxml_err(root, d, "unclosed <!DOCTYPE");
		    d = (l) ? strchr(d, '[') + 1 : d;
		    if(l && !ezxml_internal_dtd(root, d, s++ - d))
			return &root->xml;
		}
	    else if(*s == '?')
		{		/* <?...?> processing instructions */
		    do
			{
			    s = strchr(s, '?');
			}
		    while(s && *(++s) && *s != '>');
		    if(!s || (!*s && e != '>'))
			return ezxml_err(root, d, "unclosed <?");
		    else
			ezxml_proc_inst(root, d + 1, s - d - 2);
		}
	    else
		return ezxml_err(root, d, "unexpected <");

	    if(!s || !*s)
		break;
	    *s = '\0';
	    d = ++s;
	    if(*s && *s != '<')
		{		/* tag character content */
		    while(*s && *s != '<')
			s++;
		    if(*s)
			ezxml_char_content(root, d, s - d, '&');
		    else
			break;
		}
	    else if(!*s)
		break;
	}

    if(!root->cur)
	return &root->xml;
    else if(!root->cur->name)
	return ezxml_err(root, d, "root tag missing");
    else
	return ezxml_err(root, d, "unclosed tag <%s>", root->cur->name);
}

/* Wrapper for ezxml_parse_str() that accepts a file stream. Reads the entire */
/* stream into memory and then parses it. For xml files, use ezxml_parse_file() */
/* or ezxml_parse_fd() */
ezxml_t
ezxml_parse_fp(FILE * fp)
{
    ezxml_root_t root;
    size_t l, len = 0;
    char *s;

    /* Jason Luu, Aug 29, 2007. Removed assignment in conditional statement */
    s = malloc(EZXML_BUFSIZE);
    if(!s)
	return NULL;
    do
	{
	    len += (l = fread((s + len), 1, EZXML_BUFSIZE, fp));
	    if(l == EZXML_BUFSIZE)
		s = realloc(s, len + EZXML_BUFSIZE);
	}
    while(s && l == EZXML_BUFSIZE);

    if(!s)
	return NULL;
    root = (ezxml_root_t) ezxml_parse_str(s, len);
    /* Ted Campbell, Aug 14, 2007. Added explicit cast. */
    root->len = (size_t) (-1);	/* so we know to free s in ezxml_free() */
    return &root->xml;
}

/* A wrapper for ezxml_parse_str() that accepts a file descriptor. First */
/* attempts to mem map the file. Failing that, reads the file into memory. */
/* Returns NULL on failure. */
ezxml_t
ezxml_parse_fd(int fd)
{
    ezxml_root_t root;
    struct stat st;
    size_t l;
    void *m;

    if(fd < 0)
	return NULL;
    fstat(fd, &st);

#ifndef EZXML_NOMMAP
    l = (st.st_size + sysconf(_SC_PAGESIZE) -
	 1) & ~(sysconf(_SC_PAGESIZE) - 1);
    if((m =
	mmap(NULL, l, PROT_READ | PROT_WRITE, MAP_PRIVATE, fd,
	     0)) != MAP_FAILED)
	{
	    madvise(m, l, MADV_SEQUENTIAL);	/* optimize for sequential access */
	    root = (ezxml_root_t) ezxml_parse_str(m, st.st_size);
	    madvise(m, root->len = l, MADV_NORMAL);	/* put it back to normal */
	}
    else
	{			/* mmap failed, read file into memory */
#endif /* EZXML_NOMMAP */
	    l = read(fd, m = malloc(st.st_size), st.st_size);
	    root = (ezxml_root_t) ezxml_parse_str(m, l);
	    /* Ted Campbell, Aug 14, 2007. Added explicit cast. */
	    root->len = (size_t) (-1);	/* so we know to free s in ezxml_free() */
#ifndef EZXML_NOMMAP
	}
#endif /* EZXML_NOMMAP */
    return &root->xml;
}

/* a wrapper for ezxml_parse_fd that accepts a file name */
ezxml_t
ezxml_parse_file(const char *file)
{
    int fd = open(file, O_RDONLY, 0);
    ezxml_t xml = ezxml_parse_fd(fd);

    if(fd >= 0)
	close(fd);
    return xml;
}

/* Encodes ampersand sequences appending the results to *dst, reallocating *dst */
/* if length excedes max. a is non-zero for attribute encoding. Returns *dst */
char *
ezxml_ampencode(const char *s,
		size_t len,
		char **dst,
		size_t * dlen,
		size_t * max,
		short a)
{
    const char *e;

    for(e = s + len; s != e; s++)
	{
	    while(*dlen + 10 > *max)
		*dst = realloc(*dst, *max += EZXML_BUFSIZE);

	    switch (*s)
		{
		case '\0':
		    return *dst;
		case '&':
		    *dlen += sprintf(*dst + *dlen, "&amp;");
		    break;
		case '<':
		    *dlen += sprintf(*dst + *dlen, "&lt;");
		    break;
		case '>':
		    *dlen += sprintf(*dst + *dlen, "&gt;");
		    break;
		case '"':
		    *dlen += sprintf(*dst + *dlen, (a) ? "&quot;" : "\"");
		    break;
		case '\n':
		    *dlen += sprintf(*dst + *dlen, (a) ? "&#xA;" : "\n");
		    break;
		case '\t':
		    *dlen += sprintf(*dst + *dlen, (a) ? "&#x9;" : "\t");
		    break;
		case '\r':
		    *dlen += sprintf(*dst + *dlen, "&#xD;");
		    break;
		default:
		    (*dst)[(*dlen)++] = *s;
		}
	}
    return *dst;
}

/* Recursively converts each tag to xml appending it to *s. Reallocates *s if */
/* its length excedes max. start is the location of the previous tag in the */
/* parent tag's character content. Returns *s. */
char *
ezxml_toxml_r(ezxml_t xml,
	      char **s,
	      size_t * len,
	      size_t * max,
	      size_t start,
	      char ***attr)
{
    int i, j;
    char *txt = (xml->parent) ? xml->parent->txt : "";
    size_t off = 0;

    /* parent character content up to this tag */
    *s = ezxml_ampencode(txt + start, xml->off - start, s, len, max, 0);

    while(*len + strlen(xml->name) + 4 > *max)	/* reallocate s */
	*s = realloc(*s, *max += EZXML_BUFSIZE);

    *len += sprintf(*s + *len, "<%s", xml->name);	/* open tag */
    for(i = 0; xml->attr[i]; i += 2)
	{			/* tag attributes */
	    if(ezxml_attr(xml, xml->attr[i]) != xml->attr[i + 1])
		continue;
	    while(*len + strlen(xml->attr[i]) + 7 > *max)	/* reallocate s */
		*s = realloc(*s, *max += EZXML_BUFSIZE);

	    *len += sprintf(*s + *len, " %s=\"", xml->attr[i]);
	    /* Ted Campbell, Aug 14, 2007. Added explicit cast to size_t. */
	    ezxml_ampencode(xml->attr[i + 1], (size_t) (-1), s, len, max, 1);
	    *len += sprintf(*s + *len, "\"");
	}

    for(i = 0; attr[i] && strcmp(attr[i][0], xml->name); i++);
    for(j = 1; attr[i] && attr[i][j]; j += 3)
	{			/* default attributes */
	    if(!attr[i][j + 1]
	       || ezxml_attr(xml, attr[i][j]) != attr[i][j + 1])
		continue;	/* skip duplicates and non-values */
	    while(*len + strlen(attr[i][j]) + 7 > *max)	/* reallocate s */
		*s = realloc(*s, *max += EZXML_BUFSIZE);

	    *len += sprintf(*s + *len, " %s=\"", attr[i][j]);
	    /* Ted Campbell, Aug 14, 2007. Added explicit cast to size_t. */
	    ezxml_ampencode(attr[i][j + 1], (size_t) (-1), s, len, max, 1);
	    *len += sprintf(*s + *len, "\"");
	}
    *len += sprintf(*s + *len, ">");

    /* Ted Campbell, Aug 14, 2007. Added explicit cast to size_t. */
    *s = (xml->child) ? ezxml_toxml_r(xml->child, s, len, max, 0, attr)	/*child */
	: ezxml_ampencode(xml->txt, (size_t) (-1), s, len, max, 0);	/*data */

    while(*len + strlen(xml->name) + 4 > *max)	/* reallocate s */
	*s = realloc(*s, *max += EZXML_BUFSIZE);

    *len += sprintf(*s + *len, "</%s>", xml->name);	/* close tag */

    while(txt[off] && off < xml->off)
	off++;			/* make sure off is within bounds */
    /* Ted Campbell, Aug 14, 2007. Added explicit cast to size_t. */
    return (xml->ordered) ? ezxml_toxml_r(xml->ordered, s, len, max, off,
					  attr) : ezxml_ampencode(txt +
								  off,
								  (size_t)
								  (-1), s,
								  len, max,
								  0);
}

/* Converts an ezxml structure back to xml. Returns a string of xml data that */
/* must be freed. */
char *
ezxml_toxml(ezxml_t xml)
{
    ezxml_t p = (xml) ? xml->parent : NULL,
      o = (xml) ? xml->ordered : NULL;
    ezxml_root_t root = (ezxml_root_t) xml;
    size_t len = 0, max = EZXML_BUFSIZE;
    char *s = strcpy(malloc(max), ""),
     *t,
     *n;
    int i, j, k;

    if(!xml || !xml->name)
	return realloc(s, len + 1);
    while(root->xml.parent)
	root = (ezxml_root_t) root->xml.parent;	/* root tag */

    for(i = 0; !p && root->pi[i]; i++)
	{			/* pre-root processing instructions */
	    for(k = 2; root->pi[i][k - 1]; k++);
	    for(j = 1; root->pi[i][j]; j++)
		{
		    /* Jason Luu, Aug 29, 2007. Removed assignment in conditional statement */
		    n = root->pi[i][j];
		    if(root->pi[i][k][j - 1] == '>')
			continue;	/* not pre-root */
		    while(len + strlen(t = root->pi[i][0]) + strlen(n) + 7 >
			  max)
			s = realloc(s, max += EZXML_BUFSIZE);
		    len +=
			sprintf(s + len, "<?%s%s%s?>\n", t, *n ? " " : "", n);
		}
	}

    xml->parent = xml->ordered = NULL;
    s = ezxml_toxml_r(xml, &s, &len, &max, 0, root->attr);
    xml->parent = p;
    xml->ordered = o;

    for(i = 0; !p && root->pi[i]; i++)
	{			/* post-root processing instructions */
	    for(k = 2; root->pi[i][k - 1]; k++);
	    for(j = 1; root->pi[i][j]; j++)
		{
		    /* Jason Luu, Aug 29, 2007. Removed assignment in conditional statement */
		    n = root->pi[i][j];
		    if(root->pi[i][k][j - 1] == '<')
			continue;	/* not post-root */
		    while(len + strlen(t = root->pi[i][0]) + strlen(n) + 7 >
			  max)
			s = realloc(s, max += EZXML_BUFSIZE);
		    len +=
			sprintf(s + len, "\n<?%s%s%s?>", t, *n ? " " : "", n);
		}
	}
    return realloc(s, len + 1);
}

/* free the memory allocated for the ezxml structure */
void
ezxml_free(ezxml_t xml)
{
    ezxml_root_t root = (ezxml_root_t) xml;
    int i, j;
    char **a, *s;

    if(!xml)
	return;
    ezxml_free(xml->child);
    ezxml_free(xml->ordered);

    if(!xml->parent)
	{			/* free root tag allocations */
	    for(i = 10; root->ent[i]; i += 2)	/* 0 - 9 are default entites (<>&"') */
		if((s = root->ent[i + 1]) < root->s || s > root->e)
		    free(s);
	    free(root->ent);	/* free list of general entities */

	    for(i = 0; root->attr[i]; i++)
		{
		    /* Jason Luu, Aug 29, 2007. Removed assignment in conditional statement */
		    a = root->attr[i];
		    for(j = 1; a[j++]; j += 2)	/* free malloced attribute values */
			if(a[j] && (a[j] < root->s || a[j] > root->e))
			    free(a[j]);
		    free(a);
		}
	    if(root->attr[0])
		free(root->attr);	/* free default attribute list */

	    for(i = 0; root->pi[i]; i++)
		{
		    for(j = 1; root->pi[i][j]; j++);
		    free(root->pi[i][j + 1]);
		    free(root->pi[i]);
		}
	    if(root->pi[0])
		free(root->pi);	/* free processing instructions */

	    if(root->len == -1)
		free(root->m);	/* malloced xml data */
#ifndef EZXML_NOMMAP
	    else if(root->len)
		munmap(root->m, root->len);	/* mem mapped xml data */
#endif /* EZXML_NOMMAP */
	    if(root->u)
		free(root->u);	/* utf8 conversion */
	}

    ezxml_free_attr(xml->attr);	/* tag attributes */
    if((xml->flags & EZXML_TXTM))
	free(xml->txt);		/* character content */
    if((xml->flags & EZXML_NAMEM))
	free(xml->name);	/* tag name */
    free(xml);
}

/* return parser error message or empty string if none */
const char *
ezxml_error(ezxml_t xml)
{
    while(xml && xml->parent)
	xml = xml->parent;	/* find root tag */
    return (xml) ? ((ezxml_root_t) xml)->err : "";
}

/* returns a new empty ezxml structure with the given root tag name */
ezxml_t
ezxml_new(const char *name)
{
    static char *ent[] = { "lt;", "&#60;", "gt;", "&#62;", "quot;", "&#34;",
	"apos;", "&#39;", "amp;", "&#38;", NULL
    };
    ezxml_root_t root =
	(ezxml_root_t) memset(malloc(sizeof(struct ezxml_root)),
			      '\0', sizeof(struct ezxml_root));

    root->xml.name = (char *)name;
    root->cur = &root->xml;
    strcpy(root->err, root->xml.txt = "");
    root->ent = memcpy(malloc(sizeof(ent)), ent, sizeof(ent));
    root->attr = root->pi = (char ***)(root->xml.attr = EZXML_NIL);
    return &root->xml;
}

/* inserts an existing tag into an ezxml structure */
ezxml_t
ezxml_insert(ezxml_t xml,
	     ezxml_t dest,
	     size_t off)
{
    ezxml_t cur, prev, head;

    xml->next = xml->sibling = xml->ordered = NULL;
    xml->off = off;
    xml->parent = dest;

    /* Jason Luu, Aug 29, 2007. Removed assignment in conditional statement */
    head = dest->child;
    if(head)
	{			/* already have sub tags */
	    if(head->off <= off)
		{		/* not first subtag */
		    for(cur = head; cur->ordered && cur->ordered->off <= off;
			cur = cur->ordered);
		    xml->ordered = cur->ordered;
		    cur->ordered = xml;
		}
	    else
		{		/* first subtag */
		    xml->ordered = head;
		    dest->child = xml;
		}

	    for(cur = head, prev = NULL; cur && strcmp(cur->name, xml->name); prev = cur, cur = cur->sibling);	/* find tag type */
	    if(cur && cur->off <= off)
		{		/* not first of type */
		    while(cur->next && cur->next->off <= off)
			cur = cur->next;
		    xml->next = cur->next;
		    cur->next = xml;
		}
	    else
		{		/* first tag of this type */
		    if(prev && cur)
			prev->sibling = cur->sibling;	/* remove old first */
		    xml->next = cur;	/* old first tag is now next */
		    for(cur = head, prev = NULL; cur && cur->off <= off; prev = cur, cur = cur->sibling);	/* new sibling insert point */
		    xml->sibling = cur;
		    if(prev)
			prev->sibling = xml;
		}
	}
    else
	dest->child = xml;	/* only sub tag */

    return xml;
}

/* Adds a child tag. off is the offset of the child tag relative to the start */
/* of the parent tag's character content. Returns the child tag. */
ezxml_t
ezxml_add_child(ezxml_t xml,
		const char *name,
		size_t off)
{
    ezxml_t child;

    if(!xml)
	return NULL;
    child = (ezxml_t) memset(malloc(sizeof(struct ezxml)), '\0',
			     sizeof(struct ezxml));
    child->name = (char *)name;
    child->attr = EZXML_NIL;
    child->txt = "";

    return ezxml_insert(child, xml, off);
}

/* sets the character content for the given tag and returns the tag */
ezxml_t
ezxml_set_txt(ezxml_t xml,
	      const char *txt)
{
    if(!xml)
	return NULL;
    if(xml->flags & EZXML_TXTM)
	free(xml->txt);		/* existing txt was malloced */
    xml->flags &= ~EZXML_TXTM;
    xml->txt = (char *)txt;
    return xml;
}

/* Sets the given tag attribute or adds a new attribute if not found. A value */
/* of NULL will remove the specified attribute. Returns the tag given. */
ezxml_t
ezxml_set_attr(ezxml_t xml,
	       const char *name,
	       const char *value)
{
    int l = 0, c;

    if(!xml)
	return NULL;
    while(xml->attr[l] && strcmp(xml->attr[l], name))
	l += 2;
    if(!xml->attr[l])
	{			/* not found, add as new attribute */
	    if(!value)
		return xml;	/* nothing to do */
	    if(xml->attr == EZXML_NIL)
		{		/* first attribute */
		    xml->attr = malloc(4 * sizeof(char *));
		    /* Ted Campbell, Aug 14, 2007. Changed to use 'my_strdup' */
		    xml->attr[1] = my_strdup("");	/* empty list of malloced names/vals */
		}
	    else
		xml->attr = realloc(xml->attr, (l + 4) * sizeof(char *));

	    xml->attr[l] = (char *)name;	/* set attribute name */
	    xml->attr[l + 2] = NULL;	/* null terminate attribute list */
	    xml->attr[l + 3] = realloc(xml->attr[l + 1],
				       (c = strlen(xml->attr[l + 1])) + 2);
	    strcpy(xml->attr[l + 3] + c, " ");	/* set name/value as not malloced */
	    if(xml->flags & EZXML_DUP)
		xml->attr[l + 3][c] = (char)(unsigned char)EZXML_NAMEM;
	}
    else if(xml->flags & EZXML_DUP)
	free((char *)name);	/* name was strduped */

    for(c = l; xml->attr[c]; c += 2);	/* find end of attribute list */
    if(xml->attr[c + 1][l / 2] & EZXML_TXTM)
	free(xml->attr[l + 1]);	/*old val */
    if(xml->flags & EZXML_DUP)
	xml->attr[c + 1][l / 2] |= EZXML_TXTM;
    else
	xml->attr[c + 1][l / 2] &= ~EZXML_TXTM;

    if(value)
	xml->attr[l + 1] = (char *)value;	/* set attribute value */
    else
	{			/* remove attribute */
	    if(xml->attr[c + 1][l / 2] & EZXML_NAMEM)
		free(xml->attr[l]);
	    /* Ted Campbell, Aug 14, 2007. It seems that the size should be 
	     * (c + 2) - (l + 2) = (c - l) */
	    memmove(xml->attr + l, xml->attr + l + 2,
		    (c - l) * sizeof(char *));
	    /* Ted Campbell, Aug 14, 2007. We need to adjust c to point to new
	     * location it was moved to since its old location is undefined */
	    c -= 2;		/* We have one less elements */
	    xml->attr = realloc(xml->attr, (c + 2) * sizeof(char *));
	    memmove(xml->attr[c + 1] + (l / 2), xml->attr[c + 1] + (l / 2) + 1, (c / 2) - (l / 2));	/* fix list of which name/vals are malloced */
	}
    xml->flags &= ~EZXML_DUP;	/* clear strdup() flag */
    return xml;
}

/* sets a flag for the given tag and returns the tag */
ezxml_t
ezxml_set_flag(ezxml_t xml,
	       short flag)
{
    if(xml)
	xml->flags |= flag;
    return xml;
}

/* removes a tag along with its subtags without freeing its memory */
ezxml_t
ezxml_cut(ezxml_t xml)
{
    ezxml_t cur;

    if(!xml)
	return NULL;		/* nothing to do */
    if(xml->next)
	xml->next->sibling = xml->sibling;	/* patch sibling list */

    if(xml->parent)
	{			/* not root tag */
	    cur = xml->parent->child;	/* find head of subtag list */
	    if(cur == xml)
		xml->parent->child = xml->ordered;	/* first subtag */
	    else
		{		/* not first subtag */
		    while(cur->ordered != xml)
			cur = cur->ordered;
		    cur->ordered = cur->ordered->ordered;	/* patch ordered list */

		    cur = xml->parent->child;	/* go back to head of subtag list */
		    if(strcmp(cur->name, xml->name))
			{	/* not in first sibling list */
			    while(strcmp(cur->sibling->name, xml->name))
				cur = cur->sibling;
			    if(cur->sibling == xml)
				{	/* first of a sibling list */
				    cur->sibling = (xml->next) ? xml->next
					: cur->sibling->sibling;
				}
			    else
				cur = cur->sibling;	/* not first of a sibling list */
			}

		    while(cur->next && cur->next != xml)
			cur = cur->next;
		    if(cur->next)
			cur->next = cur->next->next;	/* patch next list */
		}
	}
    xml->ordered = xml->sibling = xml->next = NULL;
    return xml;
}

#ifdef EZXML_TEST		/* test harness */
int
main(int argc,
     char **argv)
{
    ezxml_t xml;
    char *s;
    int i;

    if(argc != 2)
	return fprintf(stderr, "usage: %s xmlfile\n", argv[0]);

    xml = ezxml_parse_file(argv[1]);
    printf("%s\n", (s = ezxml_toxml(xml)));
    free(s);
    i = fprintf(stderr, "%s", ezxml_error(xml));
    ezxml_free(xml);
    return (i) ? 1 : 0;
}
#endif /* EZXML_TEST */
